63a27afae3
We had support that assumed that thread local data for a variable could be determined solely from the module in which the variable exists. While this work for linux, it doesn't work for Apple OSs. The DWARF for thread local variables consists of location opcodes that do something like: DW_OP_const8u (x) DW_OP_form_tls_address or DW_OP_const8u (x) DW_OP_GNU_push_tls_address The "x" is allowed to be anything that is needed to determine the location of the variable. For Linux "x" is the offset within the TLS data for a given executable (ModuleSP in LLDB). For Apple OS variants, it is the file address of the data structure that contains a pthread key that can be used with pthread_getspecific() and the offset needed. This fix passes the "x" along to the thread: virtual lldb::addr_t lldb_private::Thread::GetThreadLocalData(const lldb::ModuleSP module, lldb::addr_t tls_file_addr); Then this is passed along to the DynamicLoader::GetThreadLocalData(): virtual lldb::addr_t lldb_private::DynamicLoader::GetThreadLocalData(const lldb::ModuleSP module, const lldb::ThreadSP thread, lldb::addr_t tls_file_addr); This allows each DynamicLoader plug-in do the right thing for the current OS. The DynamicLoaderMacOSXDYLD was modified to be able to grab the pthread key from the data structure that is in memory and call "void *pthread_getspecific(pthread_key_t key)" to get the value of the thread local storage and it caches it per thread since it never changes. I had to update the test case to access the thread local data before trying to print it as on Apple OS variants, thread locals are not available unless they have been accessed at least one by the current thread. I also added a new lldb::ValueType named "eValueTypeVariableThreadLocal" so that we can ask SBValue objects for their ValueType and be able to tell when we have a thread local variable. <rdar://problem/23308080> llvm-svn: 274366
627 lines
27 KiB
C++
627 lines
27 KiB
C++
//===-- CommandObjectFrame.cpp ----------------------------------*- C++ -*-===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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// C Includes
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// C++ Includes
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#include <string>
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// Other libraries and framework includes
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// Project includes
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#include "CommandObjectFrame.h"
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#include "lldb/Core/Debugger.h"
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#include "lldb/Core/Module.h"
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#include "lldb/Core/StreamFile.h"
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#include "lldb/Core/StreamString.h"
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#include "lldb/Core/Timer.h"
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#include "lldb/Core/Value.h"
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#include "lldb/Core/ValueObject.h"
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#include "lldb/Core/ValueObjectVariable.h"
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#include "lldb/DataFormatters/DataVisualization.h"
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#include "lldb/DataFormatters/ValueObjectPrinter.h"
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#include "lldb/Host/Host.h"
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#include "lldb/Host/StringConvert.h"
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#include "lldb/Interpreter/Args.h"
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#include "lldb/Interpreter/CommandInterpreter.h"
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#include "lldb/Interpreter/CommandReturnObject.h"
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#include "lldb/Interpreter/Options.h"
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#include "lldb/Interpreter/OptionGroupFormat.h"
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#include "lldb/Interpreter/OptionGroupValueObjectDisplay.h"
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#include "lldb/Interpreter/OptionGroupVariable.h"
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#include "lldb/Symbol/CompilerType.h"
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#include "lldb/Symbol/ClangASTContext.h"
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#include "lldb/Symbol/Function.h"
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#include "lldb/Symbol/ObjectFile.h"
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#include "lldb/Symbol/SymbolContext.h"
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#include "lldb/Symbol/Type.h"
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#include "lldb/Symbol/Variable.h"
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#include "lldb/Symbol/VariableList.h"
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#include "lldb/Target/Process.h"
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#include "lldb/Target/StackFrame.h"
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#include "lldb/Target/Thread.h"
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#include "lldb/Target/Target.h"
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using namespace lldb;
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using namespace lldb_private;
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#pragma mark CommandObjectFrameInfo
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//-------------------------------------------------------------------------
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// CommandObjectFrameInfo
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//-------------------------------------------------------------------------
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class CommandObjectFrameInfo : public CommandObjectParsed
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{
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public:
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CommandObjectFrameInfo (CommandInterpreter &interpreter) :
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CommandObjectParsed (interpreter,
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"frame info",
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"List information about the currently selected frame in the current thread.",
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"frame info",
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eCommandRequiresFrame |
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eCommandTryTargetAPILock |
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eCommandProcessMustBeLaunched |
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eCommandProcessMustBePaused )
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{
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}
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~CommandObjectFrameInfo() override = default;
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protected:
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bool
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DoExecute (Args& command, CommandReturnObject &result) override
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{
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m_exe_ctx.GetFrameRef().DumpUsingSettingsFormat (&result.GetOutputStream());
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result.SetStatus (eReturnStatusSuccessFinishResult);
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return result.Succeeded();
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}
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};
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#pragma mark CommandObjectFrameSelect
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//-------------------------------------------------------------------------
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// CommandObjectFrameSelect
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//-------------------------------------------------------------------------
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class CommandObjectFrameSelect : public CommandObjectParsed
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{
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public:
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class CommandOptions : public Options
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{
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public:
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CommandOptions (CommandInterpreter &interpreter) :
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Options(interpreter)
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{
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OptionParsingStarting ();
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}
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~CommandOptions() override = default;
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Error
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SetOptionValue (uint32_t option_idx, const char *option_arg) override
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{
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Error error;
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bool success = false;
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const int short_option = m_getopt_table[option_idx].val;
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switch (short_option)
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{
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case 'r':
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relative_frame_offset = StringConvert::ToSInt32 (option_arg, INT32_MIN, 0, &success);
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if (!success)
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error.SetErrorStringWithFormat ("invalid frame offset argument '%s'", option_arg);
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break;
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default:
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error.SetErrorStringWithFormat ("invalid short option character '%c'", short_option);
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break;
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}
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return error;
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}
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void
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OptionParsingStarting () override
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{
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relative_frame_offset = INT32_MIN;
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}
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const OptionDefinition*
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GetDefinitions () override
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{
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return g_option_table;
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}
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// Options table: Required for subclasses of Options.
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static OptionDefinition g_option_table[];
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int32_t relative_frame_offset;
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};
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CommandObjectFrameSelect (CommandInterpreter &interpreter) :
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CommandObjectParsed(interpreter,
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"frame select",
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"Select a frame by index from within the current thread and make it the current frame.",
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nullptr,
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eCommandRequiresThread |
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eCommandTryTargetAPILock |
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eCommandProcessMustBeLaunched |
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eCommandProcessMustBePaused ),
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m_options (interpreter)
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{
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CommandArgumentEntry arg;
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CommandArgumentData index_arg;
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// Define the first (and only) variant of this arg.
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index_arg.arg_type = eArgTypeFrameIndex;
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index_arg.arg_repetition = eArgRepeatOptional;
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// There is only one variant this argument could be; put it into the argument entry.
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arg.push_back (index_arg);
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// Push the data for the first argument into the m_arguments vector.
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m_arguments.push_back (arg);
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}
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~CommandObjectFrameSelect() override = default;
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Options *
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GetOptions () override
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{
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return &m_options;
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}
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protected:
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bool
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DoExecute (Args& command, CommandReturnObject &result) override
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{
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// No need to check "thread" for validity as eCommandRequiresThread ensures it is valid
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Thread *thread = m_exe_ctx.GetThreadPtr();
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uint32_t frame_idx = UINT32_MAX;
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if (m_options.relative_frame_offset != INT32_MIN)
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{
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// The one and only argument is a signed relative frame index
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frame_idx = thread->GetSelectedFrameIndex ();
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if (frame_idx == UINT32_MAX)
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frame_idx = 0;
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if (m_options.relative_frame_offset < 0)
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{
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if (static_cast<int32_t>(frame_idx) >= -m_options.relative_frame_offset)
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frame_idx += m_options.relative_frame_offset;
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else
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{
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if (frame_idx == 0)
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{
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//If you are already at the bottom of the stack, then just warn and don't reset the frame.
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result.AppendError("Already at the bottom of the stack");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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else
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frame_idx = 0;
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}
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}
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else if (m_options.relative_frame_offset > 0)
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{
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// I don't want "up 20" where "20" takes you past the top of the stack to produce
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// an error, but rather to just go to the top. So I have to count the stack here...
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const uint32_t num_frames = thread->GetStackFrameCount();
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if (static_cast<int32_t>(num_frames - frame_idx) > m_options.relative_frame_offset)
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frame_idx += m_options.relative_frame_offset;
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else
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{
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if (frame_idx == num_frames - 1)
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{
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//If we are already at the top of the stack, just warn and don't reset the frame.
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result.AppendError("Already at the top of the stack");
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result.SetStatus(eReturnStatusFailed);
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return false;
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}
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else
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frame_idx = num_frames - 1;
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}
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}
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}
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else
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{
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if (command.GetArgumentCount() == 1)
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{
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const char *frame_idx_cstr = command.GetArgumentAtIndex(0);
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bool success = false;
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frame_idx = StringConvert::ToUInt32 (frame_idx_cstr, UINT32_MAX, 0, &success);
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if (!success)
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{
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result.AppendErrorWithFormat ("invalid frame index argument '%s'", frame_idx_cstr);
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result.SetStatus (eReturnStatusFailed);
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return false;
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}
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}
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else if (command.GetArgumentCount() == 0)
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{
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frame_idx = thread->GetSelectedFrameIndex ();
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if (frame_idx == UINT32_MAX)
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{
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frame_idx = 0;
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}
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}
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else
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{
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result.AppendErrorWithFormat ("too many arguments; expected frame-index, saw '%s'.\n",
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command.GetArgumentAtIndex(0));
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m_options.GenerateOptionUsage (result.GetErrorStream(), this);
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return false;
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}
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}
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bool success = thread->SetSelectedFrameByIndexNoisily (frame_idx, result.GetOutputStream());
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if (success)
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{
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m_exe_ctx.SetFrameSP(thread->GetSelectedFrame ());
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result.SetStatus (eReturnStatusSuccessFinishResult);
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}
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else
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{
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result.AppendErrorWithFormat ("Frame index (%u) out of range.\n", frame_idx);
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result.SetStatus (eReturnStatusFailed);
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}
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return result.Succeeded();
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}
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protected:
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CommandOptions m_options;
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};
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OptionDefinition
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CommandObjectFrameSelect::CommandOptions::g_option_table[] =
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{
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{ LLDB_OPT_SET_1, false, "relative", 'r', OptionParser::eRequiredArgument, nullptr, nullptr, 0, eArgTypeOffset, "A relative frame index offset from the current frame index."},
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{ 0, false, nullptr, 0, 0, nullptr, nullptr, 0, eArgTypeNone, nullptr }
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};
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#pragma mark CommandObjectFrameVariable
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//----------------------------------------------------------------------
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// List images with associated information
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//----------------------------------------------------------------------
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class CommandObjectFrameVariable : public CommandObjectParsed
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{
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public:
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CommandObjectFrameVariable (CommandInterpreter &interpreter) :
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CommandObjectParsed(interpreter,
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"frame variable",
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"Show frame variables. All argument and local variables "
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"that are in scope will be shown when no arguments are given. "
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"If any arguments are specified, they can be names of "
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"argument, local, file static and file global variables. "
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"Children of aggregate variables can be specified such as "
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"'var->child.x'.",
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nullptr,
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eCommandRequiresFrame |
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eCommandTryTargetAPILock |
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eCommandProcessMustBeLaunched |
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eCommandProcessMustBePaused |
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eCommandRequiresProcess),
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m_option_group (interpreter),
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m_option_variable(true), // Include the frame specific options by passing "true"
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m_option_format (eFormatDefault),
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m_varobj_options()
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{
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CommandArgumentEntry arg;
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CommandArgumentData var_name_arg;
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// Define the first (and only) variant of this arg.
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var_name_arg.arg_type = eArgTypeVarName;
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var_name_arg.arg_repetition = eArgRepeatStar;
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// There is only one variant this argument could be; put it into the argument entry.
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arg.push_back (var_name_arg);
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// Push the data for the first argument into the m_arguments vector.
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m_arguments.push_back (arg);
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m_option_group.Append (&m_option_variable, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
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m_option_group.Append (&m_option_format, OptionGroupFormat::OPTION_GROUP_FORMAT | OptionGroupFormat::OPTION_GROUP_GDB_FMT, LLDB_OPT_SET_1);
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m_option_group.Append (&m_varobj_options, LLDB_OPT_SET_ALL, LLDB_OPT_SET_1);
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m_option_group.Finalize();
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}
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~CommandObjectFrameVariable() override = default;
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Options *
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GetOptions () override
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{
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return &m_option_group;
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}
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int
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HandleArgumentCompletion (Args &input,
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int &cursor_index,
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int &cursor_char_position,
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OptionElementVector &opt_element_vector,
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int match_start_point,
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int max_return_elements,
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bool &word_complete,
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StringList &matches) override
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{
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// Arguments are the standard source file completer.
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std::string completion_str (input.GetArgumentAtIndex(cursor_index));
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completion_str.erase (cursor_char_position);
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CommandCompletions::InvokeCommonCompletionCallbacks(m_interpreter,
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CommandCompletions::eVariablePathCompletion,
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completion_str.c_str(),
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match_start_point,
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max_return_elements,
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nullptr,
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word_complete,
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matches);
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return matches.GetSize();
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}
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protected:
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bool
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DoExecute (Args& command, CommandReturnObject &result) override
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{
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// No need to check "frame" for validity as eCommandRequiresFrame ensures it is valid
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StackFrame *frame = m_exe_ctx.GetFramePtr();
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Stream &s = result.GetOutputStream();
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// Be careful about the stack frame, if any summary formatter runs code, it might clear the StackFrameList
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// for the thread. So hold onto a shared pointer to the frame so it stays alive.
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VariableList *variable_list = frame->GetVariableList (m_option_variable.show_globals);
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VariableSP var_sp;
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ValueObjectSP valobj_sp;
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const char *name_cstr = nullptr;
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size_t idx;
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TypeSummaryImplSP summary_format_sp;
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if (!m_option_variable.summary.IsCurrentValueEmpty())
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DataVisualization::NamedSummaryFormats::GetSummaryFormat(ConstString(m_option_variable.summary.GetCurrentValue()), summary_format_sp);
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else if (!m_option_variable.summary_string.IsCurrentValueEmpty())
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summary_format_sp.reset(new StringSummaryFormat(TypeSummaryImpl::Flags(),m_option_variable.summary_string.GetCurrentValue()));
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DumpValueObjectOptions options(m_varobj_options.GetAsDumpOptions(eLanguageRuntimeDescriptionDisplayVerbosityFull,eFormatDefault,summary_format_sp));
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const SymbolContext& sym_ctx = frame->GetSymbolContext(eSymbolContextFunction);
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if (sym_ctx.function && sym_ctx.function->IsTopLevelFunction())
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m_option_variable.show_globals = true;
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if (variable_list)
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{
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const Format format = m_option_format.GetFormat();
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options.SetFormat(format);
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if (command.GetArgumentCount() > 0)
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{
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VariableList regex_var_list;
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// If we have any args to the variable command, we will make
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// variable objects from them...
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for (idx = 0; (name_cstr = command.GetArgumentAtIndex(idx)) != nullptr; ++idx)
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{
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if (m_option_variable.use_regex)
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{
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const size_t regex_start_index = regex_var_list.GetSize();
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RegularExpression regex (name_cstr);
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if (regex.Compile(name_cstr))
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{
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size_t num_matches = 0;
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const size_t num_new_regex_vars = variable_list->AppendVariablesIfUnique(regex,
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regex_var_list,
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num_matches);
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if (num_new_regex_vars > 0)
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{
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for (size_t regex_idx = regex_start_index, end_index = regex_var_list.GetSize();
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regex_idx < end_index;
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++regex_idx)
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{
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var_sp = regex_var_list.GetVariableAtIndex (regex_idx);
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if (var_sp)
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{
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valobj_sp = frame->GetValueObjectForFrameVariable (var_sp, m_varobj_options.use_dynamic);
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if (valobj_sp)
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{
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// if (format != eFormatDefault)
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// valobj_sp->SetFormat (format);
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if (m_option_variable.show_decl && var_sp->GetDeclaration ().GetFile())
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{
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bool show_fullpaths = false;
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bool show_module = true;
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if (var_sp->DumpDeclaration(&s, show_fullpaths, show_module))
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s.PutCString (": ");
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}
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valobj_sp->Dump(result.GetOutputStream(),options);
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}
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}
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}
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}
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else if (num_matches == 0)
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{
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result.GetErrorStream().Printf ("error: no variables matched the regular expression '%s'.\n", name_cstr);
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}
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}
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else
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{
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char regex_error[1024];
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if (regex.GetErrorAsCString(regex_error, sizeof(regex_error)))
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result.GetErrorStream().Printf ("error: %s\n", regex_error);
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else
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result.GetErrorStream().Printf ("error: unknown regex error when compiling '%s'\n", name_cstr);
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}
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}
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else // No regex, either exact variable names or variable expressions.
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{
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Error error;
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uint32_t expr_path_options = StackFrame::eExpressionPathOptionCheckPtrVsMember |
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StackFrame::eExpressionPathOptionsAllowDirectIVarAccess |
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StackFrame::eExpressionPathOptionsInspectAnonymousUnions;
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lldb::VariableSP var_sp;
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valobj_sp = frame->GetValueForVariableExpressionPath (name_cstr,
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m_varobj_options.use_dynamic,
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expr_path_options,
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var_sp,
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error);
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if (valobj_sp)
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{
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// if (format != eFormatDefault)
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// valobj_sp->SetFormat (format);
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if (m_option_variable.show_decl && var_sp && var_sp->GetDeclaration ().GetFile())
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{
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var_sp->GetDeclaration ().DumpStopContext (&s, false);
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s.PutCString (": ");
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}
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options.SetFormat(format);
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options.SetVariableFormatDisplayLanguage(valobj_sp->GetPreferredDisplayLanguage());
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Stream &output_stream = result.GetOutputStream();
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options.SetRootValueObjectName(valobj_sp->GetParent() ? name_cstr : nullptr);
|
|
valobj_sp->Dump(output_stream,options);
|
|
}
|
|
else
|
|
{
|
|
const char *error_cstr = error.AsCString(nullptr);
|
|
if (error_cstr)
|
|
result.GetErrorStream().Printf("error: %s\n", error_cstr);
|
|
else
|
|
result.GetErrorStream().Printf ("error: unable to find any variable expression path that matches '%s'\n", name_cstr);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
else // No command arg specified. Use variable_list, instead.
|
|
{
|
|
const size_t num_variables = variable_list->GetSize();
|
|
if (num_variables > 0)
|
|
{
|
|
for (size_t i=0; i<num_variables; i++)
|
|
{
|
|
var_sp = variable_list->GetVariableAtIndex(i);
|
|
bool dump_variable = true;
|
|
std::string scope_string;
|
|
switch (var_sp->GetScope())
|
|
{
|
|
case eValueTypeVariableGlobal:
|
|
// Always dump globals since we only fetched them if
|
|
// m_option_variable.show_scope was true
|
|
if (dump_variable && m_option_variable.show_scope)
|
|
scope_string = "GLOBAL: ";
|
|
break;
|
|
|
|
case eValueTypeVariableStatic:
|
|
// Always dump globals since we only fetched them if
|
|
// m_option_variable.show_scope was true, or this is
|
|
// a static variable from a block in the current scope
|
|
if (dump_variable && m_option_variable.show_scope)
|
|
scope_string = "STATIC: ";
|
|
break;
|
|
|
|
case eValueTypeVariableArgument:
|
|
dump_variable = m_option_variable.show_args;
|
|
if (dump_variable && m_option_variable.show_scope)
|
|
scope_string = " ARG: ";
|
|
break;
|
|
|
|
case eValueTypeVariableLocal:
|
|
dump_variable = m_option_variable.show_locals;
|
|
if (dump_variable && m_option_variable.show_scope)
|
|
scope_string = " LOCAL: ";
|
|
break;
|
|
|
|
case eValueTypeVariableThreadLocal:
|
|
if (dump_variable && m_option_variable.show_scope)
|
|
scope_string = "THREAD: ";
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
|
|
if (dump_variable)
|
|
{
|
|
// Use the variable object code to make sure we are
|
|
// using the same APIs as the public API will be
|
|
// using...
|
|
valobj_sp = frame->GetValueObjectForFrameVariable (var_sp,
|
|
m_varobj_options.use_dynamic);
|
|
if (valobj_sp)
|
|
{
|
|
// if (format != eFormatDefault)
|
|
// valobj_sp->SetFormat (format);
|
|
|
|
// When dumping all variables, don't print any variables
|
|
// that are not in scope to avoid extra unneeded output
|
|
if (valobj_sp->IsInScope ())
|
|
{
|
|
if (!valobj_sp->GetTargetSP()->GetDisplayRuntimeSupportValues() &&
|
|
valobj_sp->IsRuntimeSupportValue())
|
|
continue;
|
|
|
|
if (!scope_string.empty())
|
|
s.PutCString(scope_string.c_str());
|
|
|
|
if (m_option_variable.show_decl && var_sp->GetDeclaration ().GetFile())
|
|
{
|
|
var_sp->GetDeclaration ().DumpStopContext (&s, false);
|
|
s.PutCString (": ");
|
|
}
|
|
|
|
options.SetFormat(format);
|
|
options.SetVariableFormatDisplayLanguage(valobj_sp->GetPreferredDisplayLanguage());
|
|
options.SetRootValueObjectName(name_cstr);
|
|
valobj_sp->Dump(result.GetOutputStream(),options);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
result.SetStatus (eReturnStatusSuccessFinishResult);
|
|
}
|
|
|
|
if (m_interpreter.TruncationWarningNecessary())
|
|
{
|
|
result.GetOutputStream().Printf(m_interpreter.TruncationWarningText(),
|
|
m_cmd_name.c_str());
|
|
m_interpreter.TruncationWarningGiven();
|
|
}
|
|
|
|
return result.Succeeded();
|
|
}
|
|
|
|
protected:
|
|
OptionGroupOptions m_option_group;
|
|
OptionGroupVariable m_option_variable;
|
|
OptionGroupFormat m_option_format;
|
|
OptionGroupValueObjectDisplay m_varobj_options;
|
|
};
|
|
|
|
#pragma mark CommandObjectMultiwordFrame
|
|
|
|
//-------------------------------------------------------------------------
|
|
// CommandObjectMultiwordFrame
|
|
//-------------------------------------------------------------------------
|
|
|
|
CommandObjectMultiwordFrame::CommandObjectMultiwordFrame (CommandInterpreter &interpreter) :
|
|
CommandObjectMultiword (interpreter,
|
|
"frame",
|
|
"A set of commands for operating on the current thread's frames.",
|
|
"frame <subcommand> [<subcommand-options>]")
|
|
{
|
|
LoadSubCommand ("info", CommandObjectSP (new CommandObjectFrameInfo (interpreter)));
|
|
LoadSubCommand ("select", CommandObjectSP (new CommandObjectFrameSelect (interpreter)));
|
|
LoadSubCommand ("variable", CommandObjectSP (new CommandObjectFrameVariable (interpreter)));
|
|
}
|
|
|
|
CommandObjectMultiwordFrame::~CommandObjectMultiwordFrame() = default;
|